<div class="list-group">
  <a href="#/user/device" class="list-group-item" ng-class="{true: 'active', false: ''}[active == 'device']">基础配置</a>
  <a href="#/system" class="list-group-item" ng-class="{true: 'active', false: ''}[active == 'system']">邮箱配置</a>
  <a href="#/system/ngrokd" class="list-group-item" ng-class="{true: 'active', false: ''}[active == 'system/ngrokd']">Ngrok服务</a>
</div>